METHOD FOR AGITATING DENITRIFYING SOLUTION IN NITRATING AND DENITRIFYING DEVICE

摘要

PURPOSE: To eliminate the need for an agitator, to facilitate maintenance and to reduce the running cost in the device for sending a denitrified soln. obtained from a denitrification tank to a nitration tank and circulating a part of a nitrated liq. to the denitrification tank. ;CONSTITUTION: A nitrating bacteria sludge and a denitrifying bacteria sludge are introduced respectively into a nitration tank 2 and a denitrification tank 1. An org. waste water such as sewage, industrial waste water and night soil is supplied to the denitrification tank 1, and the denitrified liq. is sent to the nitration tank 2. Meanwhile, the nitrated liq. is drawn off from the bottom of the nitration tank 2 through a pipe 4 and circulated to the bottom of the denitrification tank 1 by a circulating pump 5 through a circulating pipe 6. In this case, nozzles 7 are fixed to the tips of branched parts 6a of the circulating pipe 6, the nozzle 7 is set at the bottom in the denitrification tank 1 where the sludge is easily deposited, and the circulating liq. is injected upward. Consequently, the whole liq. in the denitrification tank 1 is agitated without using an agitator.;COPYRIGHT: (C)1996,JPO